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		<p>dialog 标签定义对话框或窗口。</p>
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				<th>一月
					<dialog open>这是打开的对话窗口</dialog>
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				<th>二月</th>
				<th>三月</th>
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				<td>31</td>
				<td>28</td>
				<td>31</td>
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